Indications】 1.The fallopian tube is not patent or very poorly patent and requires treatment. 2.The fallopian tubes are not visualized or partially visualized in HSG, to distinguish whether the tubes are spasmodic or obstructed with high tension. 3.HSG shows proximal obstruction of the fallopian tube, to differentiate between complete obstruction with adhesions or obstruction with loose adhesions or more secretions, which can be treated by recanalization [Contraindications] 1.Obvious tubal effusion with obvious wrapping of the umbilical end 2.Tuberculous tubal obstruction 3.Acute and subacute internal genital inflammation, pelvic inflammatory disease, various vaginitis 4.General fever of 37.5℃ or more 5.Vaginal bleeding period 6.Scraping After the operation, normal menstruation is required [patient preparation] 1. Choose the 3rd to 7th day after menstruation, or postpone it if the menstrual cycle is long. 2. No history of sexual intercourse after menstruation and before imaging. 3. Negative test for trichomonas and mycobacteria in vagina (if positive, the test should be changed to negative three times after treatment) and cervical canal cleanliness PC within “+” (if “PC” ++, it should be rechecked after three days of vaginal medication as (If “PC” + +, the vaginal medication should be rechecked as “+/-” after three days) before the imaging. 4. For habitual abortion, if the cervical insufficiency is checked, the imaging should be performed only after three days of rising body temperature according to the basal body temperature table. 5. Pre-operative vaginal examination record of the month is required 6. Body temperature is measured on the day of surgery, if >37.5℃ cannot be contrasted 7. Urine evacuation before surgery